Reaction Steps
A mixture of (R)-6-chloro-8-(3-methyl-4-(2-methylmorpholino)phenylamino)-2,7-naphthyridin-1(2H)-one (770 mg, 2.0 mmol), 2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (0.8 g, 3.65 mmol), Pd(PPh3)4 (200.0 mg, 0.173 mmol) and Na2CO3 (1.0 g, 9.45 mmol) in a mixed solvent of dioxane (16.0 mL) and H2O (4.0 mL) was purged with N2, heated at 90° C. for 16 hours, evaporated to result in a residue which was subjected to chromatography with gradient mixed solvents from DCM/MeOH/28% aqueous NH4OH (49:10:1) to (19:10:1) afforded a product which was then recrystallized in toluene to afford the title compound. 1H NMR (DMSO-d6) δ 1.12 (d, J=6.4 Hz, 3H, CH3), 2.31 (s, 3H, CH3), 2.42 (m, 1H), 2.55 (s, 3H, CH3), 2.70 (m, 1H), 2.85-2.95 (2H), 3.65-3.73 (2H), 3.85 (m, 1H), 6.53 (d, J=7.2 Hz, 1H), 7.07 (d, J=8.4 Hz, 1H), 7.42 (d, J=8.4 Hz, 1H), 7.43 (d, J=7.2 Hz, 1H), 7.48 (s, 1H), 7.66 (d, J=2.4 Hz, 1H), 7.74 (dd, J=8.0, 2.4 Hz, 1H), 8.35 (dd, J=8.8, 2.4 Hz, 1H), 9.20 (s, 1H), 11.77 (br s, 1H, NH), 11.92 (br s, 1H, NH); ESI-MS ink 442.2 (MH+); Anal. Calcd for C26H27N5O2: C, 70.73; H, 6.16; N, 15.86. Found: C, 70.73; H, 6.13; N, 15.83.
